Yes, but the feature is well hidden.
You can find it in the app under:
More -> Settings -> Wireless networks -> [Your WLAN] -> Schedule WLAN -> Activate (enable) scheduled WLAN.
Then you can define one(!) switch-on and one (!) switch-off time per day. Sexy is different :)

For some time now, it has been possible to define several switch-on/switch-off dates per day with the controller software; this works perfectly.